Development of Transmission System Master Plan of Oman (2014-2030) Dr. Adil Ghalib Al-Busaidi, PhD, MSc, BEng, CM, MIEEE Asset Management and Planning Manager Oman Electricity Transmission Company

Outline Introduction Methodology of the Master Plan development Preliminary studies Transmission Master Plan results Findings, recommendations & way forward

Introduction Why we need Master planning? To avoid costly reworks and upgrades Control time and effort Coordination across the sector Have insight into the future challenges Knowing the potential growth areas Know the future challenges and get prepared for it (new types of equipment…)

Introduction- continued How we are going to use it? Decide voltage levels Medium term plan shall be compatible with the long term needs Securing overhead lines routes & grid stations locations Coordination of efforts with main stakeholders Plan for the required contracting strategies, financial resources and human resources Master Plan 2014-2030 5YCS 5 years window Detailed Investments decisions Strategic network structure Short circuit ratings Voltage level 15 years window

Methodology of the Master Plan development Preliminary studies Transmission Master Plan 2030 Target Transmission Structure List of investments Phasing of investments Cost estimation and recommendations

Preliminary studies-security criteria Data gathering from stakeholders: Planning studies Strategic documents for energy sector Technical standards (generation, transmission,…) Socio-economic data (population changes, GDP growth,…) Definition of planning criteria & standards based on: Grid Code Transmission Security Standards International standards

Preliminary studies-load demand forecast Two complementary methods used: Global [National level]: based on macroeconomic indicators (population changes, GDP,…) Area-based [Local level]: based on forecasted development of each area

Preliminary studies-generation expansion plan Capacity Adequacy Analysis: Objective = advise additional capacity required by 2030 Generation Scenarios: Objective = determine adequate location for additional capacity Capacity Adequacy + Generation Scenarios Final Generation Expansion Plan

Preliminary studies-generation expansion plan

Transmission Master Plan results-2030 transmission structure Coastal Backbone Evacuation of new coastal power plants (Sohar, Shinas, Suwayq,…) Interconnection with UAE (GCCIA) and possibly Iran in future Inner-Land Backbone Evacuation of Ibri power plant Southern Ring Evacuation of Sur 1&2 power plant

Transmission Master Plan results-2030 transmission structure In addition: 4th EHV route to connect Duqm & Dhofar systems Potential interest for PDO 2018 development of the Inner-Land backbone + connection SFZ–Mhadah (UAE) 2018-2020 development of 400kV to supply Muscat area 2021-2025 development of the Coastal backbone interconnection MIS-Duqm-Dhofar 2026-2030 closing of the Southern Ring MIS Duqm Dhofar PDO

Transmission Master Plan results-key changes 2014 2030 400kV : not existing 220kV : transmission network 132kV : sub-transmission network Well meshed in Muscat area No SVCs 220kV = transmission of power 132kV = supply of load 400kV : transmission network 220kV : sub-transmission network 132kV : “distribution” network Split in Muscat area SVCs in Muscat 400kV = transmission of power 220&132kV = supply of load

Transmission Master Plan results-phasing of investments 2018 development of the Inner-Land backbone + connection SFZ–Mhadah (UAE) 2018-2020 development of 400kV to supply Muscat area 2021-2025 development of the Coastal backbone interconnection MIS-Duqm-Dhofar 2026-2030 closing of the Southern Ring

Findings, recommendations & way forward Development of the EHV (400kV) network to serve as the main transmission back bone Reinforcement of HV (220&132kV networks) to serve as sub-transmission system and provide enough injection points for the load demand Recommendation: Interconnection of Duqm and Dhofar networks with the MIS Way forward: Discussions with DISCOs on new grid stations locations Issue tenders for routes surveys of the new lines Coordinate with concerned authorities for securing the lands and corridors Long term financial planning and contracting strategies Build technical capabilities to meet the future needs

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